Light S.A (LIGT3) fair value: what the stock is really worth
As of Sep 28, 2026: fair value of Light S.A BRL 5.39, price BRL 3.50, upside +54.0%, quality 45 out of 100. Calculated from audited financials with 26 valuation models and 37 quality factors, updated daily.
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Price vs Fair Value
White line = price, green steps = our fair value per fiscal year, dashed = 300-day average. As of Sep 24, 2026.
How to read this chart
60‑month range R$1.92 – R$15.42 · fair‑value band R$3.66 – R$7.33 · the R$3.50 price screens below the R$5.39 fair value. Dashed = 300-day average. As of Sep 24, 2026.
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Light S.A., together with its subsidiaries, engages in the generation, transmission, distribution, and sale of electric power in Brazil. The company distributes electricity in the state of Rio de Janeiro.
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Light S.A., together with its subsidiaries, engages in the generation, transmission, distribution, and sale of electric power in Brazil. The company distributes electricity in the state of Rio de Janeiro. It engages in the research, planning, building, operation, and exploration of generation and transmission systems; purchase, sale, import, and export of electric and thermal power, and gas and industrial utilities; provision of consulting services in the energy sector; lease of real estate and personal properties; acquisition and sale of goods related to the studies and projects; implementation, operation, and maintenance of construction works and facilities; and hydropower generation activities. In addition, the company provides services to low voltage clients, including the assembly, renovation, and maintenance of facilities. Further, it offers technology solutions and systems for the operating management of public service concessionaires, including electricity, gas, water, sewage and other utility companies; and builds, installs, operates, and explores electric power plants. The company primarily serves residential, commercial, and industrial customers. The company was founded in 1899 and is headquartered in Rio De Janeiro, Brazil.
Stock analysis
Light S.A (LIGT3) currently trades at R$3.50, while our model-based Fair Value estimate is R$5.39, implying the stock looks roughly 35.1% undervalued today.
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Valuation
Bull case: the DCF Models group reads highest at a median of R$15.93 per share, and 20 of the 23 models we run sit above the R$3.50 price.
Bear case: the Earnings-Based group reads lowest at R$1.80, and 3 of the 23 models stay below the price. Evidence for this calculation is low.
Scenario range: R$3.66 (bear) to R$7.33 (bull), the price of R$3.50 sits below it. Bear and bull are the same models on cautious and optimistic assumptions, a range, not a price target.
Quality & growth
The Quality Score stands at 45/100 (below-average quality), in the Utilities sector.
Mixed Growth: Revenue is growing, but margins or cash flow do not fully confirm the trend.
Light S.A reported revenue of R$15.0B in FY2025 versus R$14.3B in FY2021, a compound +1.2%/yr. Reported net income was R$213M in FY2025, compounding −14.5%/yr from FY2021.
Key figures
Market cap R$2.0B (≈ $379M) · P/E ratio 1.8 · P/S ratio 0.03 · EPS (TTM) R$1.90 · Net margin 1.4% · Return on equity 37.5% · Return on assets (EBIT) 2.4% · Operating margin 4.9%.
Competitive moat
Our AI-assisted moat analysis scores the competitive advantage at 42 out of 100 (low confidence).
What moves the price
The share trades about 44% below its 52-week high and 41% above its 52-week low, currently below its 200-day average.
For context, the median of 10 Utilities peers we cover trades at −40% fair-value upside, at 54%, LIGT3 screens cheaper than that median.
Fair Value models
Bear R$3.66Fair Value R$5.39Bull R$7.33
Model ⓘEach model values the company its own way (discounted cash flow, earnings, assets, dividends). The fair value above is their evidence-weighted blend, not the output of a single model. Based on fiscal year 2025 figures (about 9 months old). Earnings retained since then (R$1.42 per share) are deliberately not added.Bear ⓘBear = the cautious scenario: the same model computed with conservative anchors (lower growth, margins and valuation multiples). Together with Bull it frames a plausible valuation range, not a price target.BaseBull ⓘBull = the optimistic scenario: the same model computed with favourable anchors (higher growth, margins and valuation multiples). Together with Bear it frames a plausible valuation range, not a price target. If a model's bull case is above four times its base value, the table shows that limit with a > sign (like the overall Bull above): beyond it no assumption holds.Evidence ⓘEvidence = how well-backed THIS model's estimate is for this stock (0–100): how complete and reliable its input data are, and how well the model fits the company. The final Fair Value is an evidence-weighted blend, so better-evidenced models count more. Green ≥70, amber 50–69, grey below 50.
Growth Quality ⓘGrowth is valuable only when reinvestment earns attractive returns (Aswath Damodaran): sustainable growth depends on return on capital, reinvestment and efficiency. Basis: total company revenue over the periods shown on the cards (3Y/5Y/all years), not per share, so a merger can show up as a growth jump; per-share earnings growth is in the value-creation card.69/100
Revenue is growing, but margins or cash flow do not fully confirm the trend.
Revenue growth 1 year
+4.8%
Revenue growth 3 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+4.9%
Revenue growth 5 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+3.2%
Start year 2020 (pandemic). Over 10 years: +3.3% a year
Revenue growth 25 years ⓘMeasures the company's TOTAL revenue from reported annual statements: compound average growth per year (CAGR) from the fiscal year 3, 5 or N years back to the most recent comparable fiscal year. Not per share: buybacks do not change this number, and a merger can appear as a growth jump. Per-share growth (which does include buybacks) is in the value-creation card.
+1.6%
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What shareholders gained per year (last 5 years), in BRL ⓘWhat the business itself delivers per year: earnings growth per share plus the dividend yield. This is what you get IF the market keeps valuing the stock the same way: it contains no assumption about the market changing its mind. Computed per share, so buybacks count and a merger does not pass as growth. For a company that pays no dividend it is pure earnings growth per share. Period: earnings growth per share as CAGR over the last 5 reported fiscal years (annual statements), plus the current dividend yield. The start value is the median of the three years around the start, so a single crisis year (a pandemic or a write-down) does not distort the rate. Basis: EBIT basis. Measured in BRL: this currency has depreciated against the euro and dollar over the long run, so part of the nominal rate is currency erosion that never reaches a EUR/USD investor.
−5.9%
Earnings growth per share plus dividend.
Earnings per share, growth per year−5.9%
Dividend (yield on the price)0.0%
Pace: 5 vs 10 years ⓘTwo data points, not a trend model: earnings growth per share over the last 5 fiscal years against the last 10. Labelled "steady" when both rates are within 3 percentage points of each other, otherwise picking up or flattening. Shown only when ten years of history exist.−24.1% vs −10.4%, slowing
Profit margin 2020 to 2025 ⓘOperating margin then vs now, from reported annual statements. A falling margin after a boom year is the classic peak-earnings signal: the growth rate then leans on an inflated base.15% → 11%
Start year 2020 (pandemic)
⚠ Revenue per share shrinking 1.5%/yr over ~10Y (margins intact) ⓘStructural-decline marker: revenue PER SHARE has fallen over the last decade (robust median trend, not a single year). Backtested across 2005 to 2017, such businesses trailed the market by about 2.5 percentage points per year. Display only: it does not change the fair value or the quality score.
Growth Forecast
A lot of optimism in the price
The price assumes more growth than the company has delivered so far.
What the price assumes ⓘThis turns our valuation around: instead of asking what the share is worth, it asks what growth the current price requires. It uses the cash the company keeps after all spending (free cash flow), the same discount rate as our models, five years of growth, then slowing evenly to 2 % a year by year ten. Compared with the analysts' sales forecasts extended to the same five years (at least three analysts, for context only, it does not enter the Fair Value): within 3 percentage points counts as "in line" (amber), below that little optimism (green), above that a lot of optimism (red).
+13.9%
Yearly growth needed for the next five years to justify today's price.
What forecasts expect
n/a
No analyst forecast available.
After inflation (Brazil: IMF forecast 3.3% a year to 2030, 5.4% from 2016 to 2025) that is about +10.3% a year for the price.
Price, fair value, quality and upside side by side.
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Peer GroupⓘHow this stock ranks against its industry: the green marker is this stock, the band is the typical 25–75% peer range, and the tick is the median.Utilities - Renewable · 204 stocks
Beats the industry median on 11/14 measures
Overall it ranks above its industry peers.
Valuation
Quality Score45 · Above median
Fair Value upside+54.0% · Top 25%
Profitability
Return on equity (TTM)37.5% · Top 25%
Return on assets2.1% · Above median
Net margin (TTM)17.1% · Above median
Operating margin (TTM)4.9% · Below median
Growth and dividend
Revenue growth8.1% · Above median
Balance sheet
Debt / equity1.56× · Highest 25%
Valuation Multiplesvs Utilities - Renewable median · lower = cheaper
For bloggers, editors and developers: paste this into your site or blog (a “Custom HTML” block in WordPress), it shows the current fair value and links back here. Free, plain HTML, and welcome. Full data streams (CSV/JSON) at /developers.
Cite: Fair Value Calculator (2026). "Light S.A Fair Value". https://www.fairvalue-calculator.com/stock/LIGT3
Frequently asked questions
Is Light S.A (LIGT3) overvalued or undervalued?
As of Sep 24, 2026, our model estimates a fair value of R$5.39 versus a price of R$3.50, about +54% upside (undervalued).
What is the fair value of LIGT3?
Our model-based fair value for Light S.A is R$5.39 (as of Sep 24, 2026), built from audited fundamentals. The current price: R$3.50.
What is the quality score of LIGT3?
Light S.A has a Quality Score of 45/100. It measures business quality (profitability, growth, cash flow, balance-sheet strength, investment discipline, share issuance). Market factors such as price momentum and volatility do not enter the number; they are shown separately in the detail view.
What is the price target for Light S.A (LIGT3)?
Our model-based price target is the fair value of R$5.39 (as of Sep 24, 2026) from 23 valuation models. Cautious scenario R$3.66, optimistic scenario R$7.33. It is a calculation from audited fundamentals, not an analyst target.
What is the Light S.A stock forecast for 2026?
Our models put fair value at R$5.39, about +54% upside versus a price of R$3.50 (undervalued). Cautious scenario R$3.66, optimistic scenario R$7.33. The calculation is refreshed regularly with new filings.
What is the revenue of Light S.A (LIGT3)?
Light S.A reported trailing-twelve-month revenue of about R$15.3B (latest available figure, as of Sep 24, 2026).
What growth is priced into Light S.A (LIGT3)?
For today's price to be fair in a discounted-cash-flow model, Light S.A would have to grow free cash flow by +13.9 % per year for five years (discount rate 12.8 %, then slowing evenly to 2 % perpetual growth by year ten). Over the last 5 years revenue grew +3.2 % per year. As of Sep 24, 2026.
What discount rate (WACC) does the fair value of LIGT3 use?
Our models discount Light S.A at 12.8 %: a base by market capitalisation (small), damped by beta 0.61, country premium for Brazil. The same rate applies in all 26 models.
What is a reverse DCF?
A reverse DCF turns the usual calculation around. Instead of deriving a value from assumptions, it takes today's price as given and asks: what free-cash-flow growth would a company have to deliver for exactly this price to be fair? The result is not a forecast but the expectation already priced in. For Light S.A that is +13.9 % per year a year over ten years, using the same discount rate (12.8 %) and the same formula as our fair value.
How much growth has Light S.A (LIGT3) delivered so far?
Over the past 5 years revenue at Light S.A grew +3.2 % a year. The price currently implies +13.9 % per year free-cash-flow growth a year. Comparing the two shows how much confidence is in the price: if it demands more than has been delivered, the business has to accelerate for the maths to work.
How fast is the sector of Light S.A (LIGT3) growing?
The median revenue growth in the sector is +2.7 % a year. That is the yardstick for the growth priced into Light S.A (+13.9 % per year a year): it shows whether the expectation is within the usual range or beyond it.
What is the free cash flow yield of Light S.A (LIGT3)?
The free-cash-flow yield on the price is 41.06 %: that much free cash flow Light S.A produces per unit of market value. When it exceeds the discount rate of our models (12.8 %), the business already earns more than its cost of capital demands, and the price needs little additional growth.
What is the intrinsic value of Light S.A (LIGT3)?
Intrinsic value and fair value mean the same thing: what the business is worth on its numbers, independent of the share price. For Light S.A it is R$5.39 per share (as of Sep 24, 2026), against a price of R$3.50. It is the blended result of 23 valuation models (cash flow, earnings, asset, dividend).
Is Light S.A stock overvalued or undervalued in 2026?
As of Sep 24, 2026, LIGT3 trades below its calculated fair value: price R$3.50, fair value R$5.39, a gap of about +54% (undervalued). The calculation is refreshed with each new quarterly report, so the verdict can change during the year.
Is fair value the same as the market price of LIGT3?
No. The price is what the market pays today (R$3.50); the fair value is what the company's own numbers justify (R$5.39). For Light S.A the two are R$1.89 per share apart. That gap is exactly why we show both numbers side by side.
How much is Light S.A worth?
The market values Light S.A at about R$2.0B (market capitalisation, as of Sep 24, 2026). Per share that is R$3.50; our models calculate a fair value of R$5.39 per share.
What do the bullish and bearish scenarios say about LIGT3?
Our models span a range for Light S.A: cautious scenario R$3.66, base R$5.39, optimistic R$7.33 per share (as of Sep 24, 2026, price R$3.50). The range comes from different growth and margin assumptions, not from analyst opinions.
What is the P/E ratio of LIGT3?
Light S.A trades at a price-to-earnings ratio of 1.8 (as of Sep 24, 2026). A P/E on its own says little: it compares the price with ONE year of profit, while our fair value of R$5.39 is built from several models across several years. Other multiples: PEG 1.5, P/B 0.4, P/S 0.1, EV/EBITDA 5.9.
What is the PEG ratio of LIGT3?
The PEG ratio of Light S.A is 1.53 (P/E divided by earnings growth, as of Sep 24, 2026). That is above 1, so the growth is already paid for in the price.
How solid is the balance sheet of Light S.A (LIGT3)?
Balance-sheet figures for Light S.A (as of Sep 24, 2026): return on equity 37.5%, debt of 1.56 per unit of equity. They feed the Quality Score of 45/100, which measures business quality independently of the share price.
How far is LIGT3 from its 52-week high?
Light S.A trades at R$3.50, about 44% below its 52-week high of R$6.20 and 41% above the low of R$2.48 (as of Sep 28, 2026). Distance from the high says nothing about value: that is what the fair value of R$5.39 is for.
Which stocks are comparable to Light S.A?
From the same area (Utilities) we also value China Yangtze Power Co, Ørsted A/S, Huaneng Lancang River Hydropower Inc, Fortum Oyj, among others. Each of them has its own fair-value calculation on this site using the same models, so the comparison is like for like.
Is Light S.A stock attractive at the current price?
The data as of Sep 24, 2026: price R$3.50, calculated fair value R$5.39 (+54%), Quality Score 45/100, from 23 models. Whether that fits your horizon and risk tolerance is your call. We provide the calculation, not investment advice.
How is the fair value of LIGT3 calculated?
We run Light S.A through 23 models from four families: discounted cash flow, earnings models, asset and balance-sheet models, and dividend models. Every model gets the same audited fundamentals; the result is the weighted average of R$5.39, with the spread shown as a cautious and an optimistic scenario.
Is it still worth investing in stocks now?
The global stock market currently sits 14.9 % above its aggregate fair value. Light S.A currently trades 35 % below its own fair value, and the market average says nothing about that. An expensive market is no reason to stay out and no reason to buy everything at once: keep a broad savings plan running, buy single stocks only with money you can do without, and hold part of your money liquid while the market is high. The full picture including sectors is on is it worth investing now.
What is the share price of Light S.A (LIGT3)?
The closing price on Sep 28, 2026 was R$3.50. Our model-based fair value is R$5.39, about +54% upside (undervalued). We carry closing prices from our data provider, not a live tick.
What should I pay attention to with Light S.A right now?
The price is below even our cautious bear case (R$3.66). The market is more pessimistic than our downside scenario. The large gap to fair value rests on thin data (low evidence): fewer applicable models and a shorter history. Read it with extra caution. Solid quality (45/100) at a price below fair value, the discount is the argument here, not the business quality. A fairly wide model range (R$3.66 to R$7.33) leaves room in how you read the outcome.
Where does the earnings growth of Light S.A (LIGT3) come from?
Earnings per share at Light S.A grew +1.1 % a year from 2014 to 2025. Broken into its drivers: revenue per share −2.3 %, EBIT margin +2.1 %, tax rate +0.0 %, residual (interest, one-offs) +1.4 %. The four rates multiply to the earnings growth rate, they do not add up. Start and end are three-year averages so a single exceptional year does not distort the result.
Key figures of Light S.A
How large is the market capitalisation of Light S.A (LIGT3)?
The market capitalisation of Light S.A is R$2.0B (≈ $379M). The stock-market value of the whole company: share price times number of shares. It is what the market asks for the entire business today.
What is the P/S ratio of Light S.A (LIGT3)?
The price-to-sales ratio of Light S.A is 0.03 (P/E × margin). Price to sales: market value relative to yearly revenue. Useful when profit is thin or distorted.
What are the earnings per share of Light S.A (LIGT3)?
Earnings per share at Light S.A are R$1.90 (price ÷ EPS = P/E 1.8). Earnings per share over the last twelve months: total profit spread across every single share.
What is the net margin of Light S.A (LIGT3)?
The net margin of Light S.A is 1.4% (fiscal year 2025). How much of every unit of revenue ends up as profit. 10% means 10 cents of profit per dollar of sales.
What is the return on equity of Light S.A (LIGT3)?
The return on equity (ROE) of Light S.A is 37.5% (last twelve months). Profit relative to shareholders' equity, how efficiently the company works with its owners' money.
What is the EBIT return on assets of Light S.A (LIGT3)?
On an EBIT basis the return on assets of Light S.A is 2.4% (avg 5y). Operating profit (EBIT) relative to everything the company owns, as a multi-year average. It describes the business model rather than one good or bad year.
What is the operating margin of Light S.A (LIGT3)?
The operating margin of Light S.A is 4.9% (last twelve months). Profit from the core business (before interest and taxes) relative to revenue.
How fast is revenue growing at Light S.A (LIGT3)?
Revenue at Light S.A is growing +8.1% versus a year earlier (3y avg +4.9%). How much revenue grew versus a year earlier (YoY). The 3-year average next to it puts the single year in context.
How fast are earnings growing at Light S.A (LIGT3)?
Earnings per share at Light S.A are growing +609% versus a year earlier. How much earnings per share grew versus a year earlier.
How much net debt does Light S.A (LIGT3) carry?
The net debt of Light S.A is R$9.9B (fiscal year 2025, ≈ 18.4 yrs of FCF). Debt minus cash on hand. The note shows how many years of free cash flow could in theory pay it off.
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Thin data
Sep 24, 2026